/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 16:24:01,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 16:24:01,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 16:24:01,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 16:24:01,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 16:24:01,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 16:24:01,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 16:24:01,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 16:24:01,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 16:24:01,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 16:24:01,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 16:24:01,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 16:24:01,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 16:24:01,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 16:24:01,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 16:24:01,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 16:24:01,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 16:24:01,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 16:24:01,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 16:24:01,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 16:24:01,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 16:24:01,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 16:24:01,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 16:24:01,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 16:24:01,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 16:24:01,659 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 16:24:01,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 16:24:01,660 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 16:24:01,660 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 16:24:01,661 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 16:24:01,661 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 16:24:01,661 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 16:24:01,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 16:24:01,662 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 16:24:01,663 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 16:24:01,663 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 16:24:01,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 16:24:01,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 16:24:01,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 16:24:01,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 16:24:01,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 16:24:01,667 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 16:24:01,694 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 16:24:01,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 16:24:01,695 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 16:24:01,695 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 16:24:01,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 16:24:01,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 16:24:01,697 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 16:24:01,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 16:24:01,697 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 16:24:01,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 16:24:01,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 16:24:01,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 16:24:01,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 16:24:01,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 16:24:01,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 16:24:01,698 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 16:24:01,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 16:24:01,699 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 16:24:01,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 16:24:01,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 16:24:01,699 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 16:24:01,699 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 16:24:01,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 16:24:01,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 16:24:01,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 16:24:01,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 16:24:01,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 16:24:01,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 16:24:01,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 16:24:01,700 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 16:24:01,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 16:24:01,701 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 16:24:01,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 16:24:01,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 16:24:01,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 16:24:01,952 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-09 16:24:01,952 INFO L275 PluginConnector]: CDTParser initialized [2021-07-09 16:24:01,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2021-07-09 16:24:02,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a45345aac/3e76c8ac09344f4080fd81d5d9cb2a62/FLAG4a491cb22 [2021-07-09 16:24:02,414 INFO L306 CDTParser]: Found 1 translation units. [2021-07-09 16:24:02,415 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2021-07-09 16:24:02,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a45345aac/3e76c8ac09344f4080fd81d5d9cb2a62/FLAG4a491cb22 [2021-07-09 16:24:02,776 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a45345aac/3e76c8ac09344f4080fd81d5d9cb2a62 [2021-07-09 16:24:02,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 16:24:02,779 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-09 16:24:02,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-09 16:24:02,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-09 16:24:02,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-09 16:24:02,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 04:24:02" (1/1) ... [2021-07-09 16:24:02,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ba5c412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:24:02, skipping insertion in model container [2021-07-09 16:24:02,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.07 04:24:02" (1/1) ... [2021-07-09 16:24:02,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-09 16:24:02,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-09 16:24:03,067 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i[30952,30965] [2021-07-09 16:24:03,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 16:24:03,077 INFO L203 MainTranslator]: Completed pre-run [2021-07-09 16:24:03,118 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i[30952,30965] [2021-07-09 16:24:03,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-09 16:24:03,147 INFO L208 MainTranslator]: Completed translation [2021-07-09 16:24:03,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:24:03 WrapperNode [2021-07-09 16:24:03,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-09 16:24:03,149 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 16:24:03,149 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 16:24:03,149 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 16:24:03,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:24:03" (1/1) ... [2021-07-09 16:24:03,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:24:03" (1/1) ... [2021-07-09 16:24:03,180 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 16:24:03,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 16:24:03,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 16:24:03,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 16:24:03,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:24:03" (1/1) ... [2021-07-09 16:24:03,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:24:03" (1/1) ... [2021-07-09 16:24:03,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:24:03" (1/1) ... [2021-07-09 16:24:03,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:24:03" (1/1) ... [2021-07-09 16:24:03,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:24:03" (1/1) ... [2021-07-09 16:24:03,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:24:03" (1/1) ... [2021-07-09 16:24:03,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:24:03" (1/1) ... [2021-07-09 16:24:03,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 16:24:03,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 16:24:03,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 16:24:03,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 16:24:03,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:24:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 16:24:03,261 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-07-09 16:24:03,261 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-07-09 16:24:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-07-09 16:24:03,262 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-07-09 16:24:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-09 16:24:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-07-09 16:24:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-09 16:24:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-09 16:24:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-09 16:24:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-07-09 16:24:03,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 16:24:03,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 16:24:03,263 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 16:24:03,499 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 16:24:03,500 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-07-09 16:24:03,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 04:24:03 BoogieIcfgContainer [2021-07-09 16:24:03,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 16:24:03,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 16:24:03,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 16:24:03,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 16:24:03,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.07 04:24:02" (1/3) ... [2021-07-09 16:24:03,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@735de5cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 04:24:03, skipping insertion in model container [2021-07-09 16:24:03,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.07 04:24:03" (2/3) ... [2021-07-09 16:24:03,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@735de5cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 04:24:03, skipping insertion in model container [2021-07-09 16:24:03,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 04:24:03" (3/3) ... [2021-07-09 16:24:03,506 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2021-07-09 16:24:03,509 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 16:24:03,509 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 16:24:03,509 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 16:24:03,510 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 16:24:03,531 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,531 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,531 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,532 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,532 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,532 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,532 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,532 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,532 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,532 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,533 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,533 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,533 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,533 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,533 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,533 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,533 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,533 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,534 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,534 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,534 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,534 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,534 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,534 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,534 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,534 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,535 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,535 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,535 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,535 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,535 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,535 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,535 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,535 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,535 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,536 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,536 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,536 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,536 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,536 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,536 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,536 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,536 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,537 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,537 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,537 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,537 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,537 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,537 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,537 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,537 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,538 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,538 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,538 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,538 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,538 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,539 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,540 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,540 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,540 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,540 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,540 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,549 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,550 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,550 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,550 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,550 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,550 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-09 16:24:03,552 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-07-09 16:24:03,568 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 16:24:03,579 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 16:24:03,580 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 16:24:03,580 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 16:24:03,580 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 16:24:03,580 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 16:24:03,580 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 16:24:03,580 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 16:24:03,580 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 16:24:03,586 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-07-09 16:24:03,645 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 780 states, 779 states have (on average 2.934531450577664) internal successors, (2286), 779 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:03,647 INFO L276 IsEmpty]: Start isEmpty. Operand has 780 states, 779 states have (on average 2.934531450577664) internal successors, (2286), 779 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:03,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 16:24:03,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:03,655 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:03,655 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:03,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:03,658 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-07-09 16:24:03,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:03,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822393835] [2021-07-09 16:24:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:24:03,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:03,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822393835] [2021-07-09 16:24:03,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822393835] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:24:03,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:24:03,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 16:24:03,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124032651] [2021-07-09 16:24:03,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 16:24:03,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:03,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 16:24:03,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 16:24:03,943 INFO L87 Difference]: Start difference. First operand has 780 states, 779 states have (on average 2.934531450577664) internal successors, (2286), 779 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:04,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:04,074 INFO L93 Difference]: Finished difference Result 1582 states and 4288 transitions. [2021-07-09 16:24:04,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 16:24:04,075 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 16:24:04,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:04,090 INFO L225 Difference]: With dead ends: 1582 [2021-07-09 16:24:04,090 INFO L226 Difference]: Without dead ends: 1248 [2021-07-09 16:24:04,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 16:24:04,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-09 16:24:04,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 800. [2021-07-09 16:24:04,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.728410513141427) internal successors, (2180), 799 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:04,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-07-09 16:24:04,178 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 32 [2021-07-09 16:24:04,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:04,178 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-07-09 16:24:04,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:04,179 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-07-09 16:24:04,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 16:24:04,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:04,185 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:04,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 16:24:04,186 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:04,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:04,189 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-07-09 16:24:04,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:04,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184710338] [2021-07-09 16:24:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:24:04,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:04,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184710338] [2021-07-09 16:24:04,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184710338] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:24:04,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:24:04,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 16:24:04,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315122649] [2021-07-09 16:24:04,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 16:24:04,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:04,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 16:24:04,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 16:24:04,260 INFO L87 Difference]: Start difference. First operand 800 states and 2180 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:04,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:04,331 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-07-09 16:24:04,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 16:24:04,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-09 16:24:04,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:04,337 INFO L225 Difference]: With dead ends: 1302 [2021-07-09 16:24:04,337 INFO L226 Difference]: Without dead ends: 920 [2021-07-09 16:24:04,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 16:24:04,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-07-09 16:24:04,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-07-09 16:24:04,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.6882966396292005) internal successors, (2320), 863 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:04,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-07-09 16:24:04,361 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-07-09 16:24:04,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:04,362 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-07-09 16:24:04,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:04,362 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-07-09 16:24:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 16:24:04,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:04,363 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:04,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 16:24:04,364 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:04,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:04,365 INFO L82 PathProgramCache]: Analyzing trace with hash -262940086, now seen corresponding path program 1 times [2021-07-09 16:24:04,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:04,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107323757] [2021-07-09 16:24:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:24:04,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:04,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107323757] [2021-07-09 16:24:04,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107323757] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:24:04,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:24:04,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-09 16:24:04,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227343311] [2021-07-09 16:24:04,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 16:24:04,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:04,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 16:24:04,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 16:24:04,458 INFO L87 Difference]: Start difference. First operand 864 states and 2320 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:04,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:04,599 INFO L93 Difference]: Finished difference Result 1304 states and 3456 transitions. [2021-07-09 16:24:04,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 16:24:04,599 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 16:24:04,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:04,603 INFO L225 Difference]: With dead ends: 1304 [2021-07-09 16:24:04,603 INFO L226 Difference]: Without dead ends: 1044 [2021-07-09 16:24:04,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:24:04,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-07-09 16:24:04,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 876. [2021-07-09 16:24:04,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.7062857142857144) internal successors, (2368), 875 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-07-09 16:24:04,622 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-07-09 16:24:04,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:04,622 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-07-09 16:24:04,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:04,623 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-07-09 16:24:04,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-09 16:24:04,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:04,625 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:04,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 16:24:04,626 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:04,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:04,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1449045748, now seen corresponding path program 2 times [2021-07-09 16:24:04,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:04,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758963530] [2021-07-09 16:24:04,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:24:04,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:04,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758963530] [2021-07-09 16:24:04,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758963530] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 16:24:04,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 16:24:04,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-09 16:24:04,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30786519] [2021-07-09 16:24:04,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 16:24:04,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:04,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 16:24:04,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 16:24:04,696 INFO L87 Difference]: Start difference. First operand 876 states and 2368 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:04,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:04,820 INFO L93 Difference]: Finished difference Result 1676 states and 4552 transitions. [2021-07-09 16:24:04,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 16:24:04,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-09 16:24:04,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:04,828 INFO L225 Difference]: With dead ends: 1676 [2021-07-09 16:24:04,829 INFO L226 Difference]: Without dead ends: 1166 [2021-07-09 16:24:04,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-09 16:24:04,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-07-09 16:24:04,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 922. [2021-07-09 16:24:04,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.732899022801303) internal successors, (2517), 921 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:04,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2517 transitions. [2021-07-09 16:24:04,849 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2517 transitions. Word has length 40 [2021-07-09 16:24:04,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:04,850 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 2517 transitions. [2021-07-09 16:24:04,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:04,850 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2517 transitions. [2021-07-09 16:24:04,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 16:24:04,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:04,852 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:04,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 16:24:04,852 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:04,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:04,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1733061585, now seen corresponding path program 1 times [2021-07-09 16:24:04,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:04,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330397372] [2021-07-09 16:24:04,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:04,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:24:04,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:04,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330397372] [2021-07-09 16:24:04,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330397372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:04,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831198409] [2021-07-09 16:24:04,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:05,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 16:24:05,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:24:05,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831198409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:05,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:05,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 16:24:05,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882502256] [2021-07-09 16:24:05,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 16:24:05,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:05,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 16:24:05,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 16:24:05,208 INFO L87 Difference]: Start difference. First operand 922 states and 2517 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:05,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:05,429 INFO L93 Difference]: Finished difference Result 2146 states and 5779 transitions. [2021-07-09 16:24:05,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 16:24:05,429 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-09 16:24:05,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:05,435 INFO L225 Difference]: With dead ends: 2146 [2021-07-09 16:24:05,435 INFO L226 Difference]: Without dead ends: 1556 [2021-07-09 16:24:05,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-07-09 16:24:05,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2021-07-09 16:24:05,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1328. [2021-07-09 16:24:05,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 2.7754333082140166) internal successors, (3683), 1327 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:05,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 3683 transitions. [2021-07-09 16:24:05,467 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 3683 transitions. Word has length 45 [2021-07-09 16:24:05,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:05,467 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 3683 transitions. [2021-07-09 16:24:05,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:05,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 3683 transitions. [2021-07-09 16:24:05,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 16:24:05,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:05,472 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:05,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:05,681 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:05,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:05,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1274253893, now seen corresponding path program 1 times [2021-07-09 16:24:05,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:05,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906742545] [2021-07-09 16:24:05,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:24:05,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:05,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906742545] [2021-07-09 16:24:05,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906742545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:05,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701474406] [2021-07-09 16:24:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:05,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 16:24:05,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:24:05,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701474406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:05,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:05,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 16:24:05,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840197660] [2021-07-09 16:24:05,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 16:24:05,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:05,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 16:24:05,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 16:24:05,942 INFO L87 Difference]: Start difference. First operand 1328 states and 3683 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:06,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:06,116 INFO L93 Difference]: Finished difference Result 2160 states and 5889 transitions. [2021-07-09 16:24:06,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 16:24:06,116 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-09 16:24:06,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:06,124 INFO L225 Difference]: With dead ends: 2160 [2021-07-09 16:24:06,124 INFO L226 Difference]: Without dead ends: 1566 [2021-07-09 16:24:06,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-07-09 16:24:06,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2021-07-09 16:24:06,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1122. [2021-07-09 16:24:06,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.735950044603033) internal successors, (3067), 1121 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:06,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3067 transitions. [2021-07-09 16:24:06,148 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3067 transitions. Word has length 50 [2021-07-09 16:24:06,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:06,148 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 3067 transitions. [2021-07-09 16:24:06,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:06,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3067 transitions. [2021-07-09 16:24:06,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 16:24:06,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:06,151 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:06,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:06,369 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:06,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:06,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1431609058, now seen corresponding path program 2 times [2021-07-09 16:24:06,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:06,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262834358] [2021-07-09 16:24:06,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:24:06,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:06,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262834358] [2021-07-09 16:24:06,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262834358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:06,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383037475] [2021-07-09 16:24:06,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:06,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 16:24:06,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:06,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 16:24:06,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:24:06,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383037475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:06,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:06,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 16:24:06,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712885819] [2021-07-09 16:24:06,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 16:24:06,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:06,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 16:24:06,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-09 16:24:06,637 INFO L87 Difference]: Start difference. First operand 1122 states and 3067 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:06,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:06,957 INFO L93 Difference]: Finished difference Result 2676 states and 7214 transitions. [2021-07-09 16:24:06,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:24:06,958 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-07-09 16:24:06,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:06,965 INFO L225 Difference]: With dead ends: 2676 [2021-07-09 16:24:06,965 INFO L226 Difference]: Without dead ends: 2086 [2021-07-09 16:24:06,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-07-09 16:24:06,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-07-09 16:24:06,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1678. [2021-07-09 16:24:06,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 2.7924865831842576) internal successors, (4683), 1677 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:06,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 4683 transitions. [2021-07-09 16:24:06,997 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 4683 transitions. Word has length 55 [2021-07-09 16:24:06,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:06,998 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 4683 transitions. [2021-07-09 16:24:06,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:06,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 4683 transitions. [2021-07-09 16:24:07,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-07-09 16:24:07,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:07,000 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:07,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:07,221 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:07,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:07,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1063601238, now seen corresponding path program 3 times [2021-07-09 16:24:07,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:07,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606875102] [2021-07-09 16:24:07,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:24:07,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:07,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606875102] [2021-07-09 16:24:07,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606875102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:07,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234462526] [2021-07-09 16:24:07,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:07,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 16:24:07,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:07,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 16:24:07,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:24:07,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234462526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:07,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:07,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-09 16:24:07,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828173956] [2021-07-09 16:24:07,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:24:07,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:07,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:24:07,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:24:07,452 INFO L87 Difference]: Start difference. First operand 1678 states and 4683 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:07,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:07,726 INFO L93 Difference]: Finished difference Result 2896 states and 7789 transitions. [2021-07-09 16:24:07,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 16:24:07,726 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-07-09 16:24:07,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:07,734 INFO L225 Difference]: With dead ends: 2896 [2021-07-09 16:24:07,734 INFO L226 Difference]: Without dead ends: 2306 [2021-07-09 16:24:07,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 222.0ms TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2021-07-09 16:24:07,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-07-09 16:24:07,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1412. [2021-07-09 16:24:07,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 2.733522324592488) internal successors, (3857), 1411 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 3857 transitions. [2021-07-09 16:24:07,762 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 3857 transitions. Word has length 60 [2021-07-09 16:24:07,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:07,762 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 3857 transitions. [2021-07-09 16:24:07,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:07,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 3857 transitions. [2021-07-09 16:24:07,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 16:24:07,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:07,764 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:07,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:07,981 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:07,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:07,981 INFO L82 PathProgramCache]: Analyzing trace with hash -869732173, now seen corresponding path program 4 times [2021-07-09 16:24:07,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:07,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421447775] [2021-07-09 16:24:07,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:24:08,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:08,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421447775] [2021-07-09 16:24:08,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421447775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:08,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44134839] [2021-07-09 16:24:08,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:08,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 16:24:08,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:08,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 16:24:08,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:24:08,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44134839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:08,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:08,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 16:24:08,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284486275] [2021-07-09 16:24:08,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 16:24:08,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:08,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 16:24:08,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 16:24:08,267 INFO L87 Difference]: Start difference. First operand 1412 states and 3857 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:08,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:08,579 INFO L93 Difference]: Finished difference Result 3170 states and 8675 transitions. [2021-07-09 16:24:08,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 16:24:08,580 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-09 16:24:08,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:08,588 INFO L225 Difference]: With dead ends: 3170 [2021-07-09 16:24:08,588 INFO L226 Difference]: Without dead ends: 2356 [2021-07-09 16:24:08,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 253.0ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-07-09 16:24:08,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-07-09 16:24:08,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2028. [2021-07-09 16:24:08,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.8036507153428714) internal successors, (5683), 2027 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:08,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5683 transitions. [2021-07-09 16:24:08,623 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5683 transitions. Word has length 65 [2021-07-09 16:24:08,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:08,623 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5683 transitions. [2021-07-09 16:24:08,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:08,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5683 transitions. [2021-07-09 16:24:08,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-07-09 16:24:08,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:08,626 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:08,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:08,836 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:08,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:08,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1091589415, now seen corresponding path program 5 times [2021-07-09 16:24:08,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:08,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524983739] [2021-07-09 16:24:08,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:08,931 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:24:08,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:08,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524983739] [2021-07-09 16:24:08,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524983739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:08,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753195345] [2021-07-09 16:24:08,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:08,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 16:24:08,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:08,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 16:24:08,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:24:09,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753195345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:09,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:09,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-09 16:24:09,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289105830] [2021-07-09 16:24:09,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:24:09,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:09,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:24:09,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:24:09,088 INFO L87 Difference]: Start difference. First operand 2028 states and 5683 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:09,513 INFO L93 Difference]: Finished difference Result 3776 states and 10225 transitions. [2021-07-09 16:24:09,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 16:24:09,513 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-07-09 16:24:09,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:09,523 INFO L225 Difference]: With dead ends: 3776 [2021-07-09 16:24:09,523 INFO L226 Difference]: Without dead ends: 2876 [2021-07-09 16:24:09,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 340.8ms TimeCoverageRelationStatistics Valid=375, Invalid=1107, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 16:24:09,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-07-09 16:24:09,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2203. [2021-07-09 16:24:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 2.8079019073569484) internal successors, (6183), 2202 states have internal predecessors, (6183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:09,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 6183 transitions. [2021-07-09 16:24:09,566 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 6183 transitions. Word has length 70 [2021-07-09 16:24:09,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:09,566 INFO L482 AbstractCegarLoop]: Abstraction has 2203 states and 6183 transitions. [2021-07-09 16:24:09,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:09,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 6183 transitions. [2021-07-09 16:24:09,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-07-09 16:24:09,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:09,569 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:09,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:09,785 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:09,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:09,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1253969596, now seen corresponding path program 6 times [2021-07-09 16:24:09,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:09,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681363835] [2021-07-09 16:24:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 16:24:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:24:09,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 16:24:09,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681363835] [2021-07-09 16:24:09,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681363835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:09,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293061407] [2021-07-09 16:24:09,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:09,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 16:24:09,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 16:24:09,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 16:24:09,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 16:24:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 16:24:10,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293061407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 16:24:10,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 16:24:10,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-09 16:24:10,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049222368] [2021-07-09 16:24:10,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 16:24:10,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 16:24:10,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 16:24:10,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 16:24:10,035 INFO L87 Difference]: Start difference. First operand 2203 states and 6183 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:10,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 16:24:10,428 INFO L93 Difference]: Finished difference Result 3160 states and 8639 transitions. [2021-07-09 16:24:10,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 16:24:10,429 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-07-09 16:24:10,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 16:24:10,441 INFO L225 Difference]: With dead ends: 3160 [2021-07-09 16:24:10,441 INFO L226 Difference]: Without dead ends: 2656 [2021-07-09 16:24:10,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 300.3ms TimeCoverageRelationStatistics Valid=347, Invalid=985, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 16:24:10,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-07-09 16:24:10,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2378. [2021-07-09 16:24:10,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.8115271350441735) internal successors, (6683), 2377 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6683 transitions. [2021-07-09 16:24:10,487 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6683 transitions. Word has length 75 [2021-07-09 16:24:10,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 16:24:10,488 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6683 transitions. [2021-07-09 16:24:10,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 16:24:10,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6683 transitions. [2021-07-09 16:24:10,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-07-09 16:24:10,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 16:24:10,491 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 16:24:10,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 16:24:10,705 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-09 16:24:10,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 16:24:10,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1121801400, now seen corresponding path program 7 times [2021-07-09 16:24:10,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 16:24:10,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249720458] [2021-07-09 16:24:10,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 16:24:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-09 16:24:10,715 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-09 16:24:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-09 16:24:10,722 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-09 16:24:10,760 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-09 16:24:10,760 INFO L609 BasicCegarLoop]: Counterexample might be feasible [2021-07-09 16:24:10,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-09 16:24:10,762 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 16:24:10,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 04:24:10 BasicIcfg [2021-07-09 16:24:10,820 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 16:24:10,821 INFO L168 Benchmark]: Toolchain (without parser) took 8041.88 ms. Allocated memory was 188.7 MB in the beginning and 336.6 MB in the end (delta: 147.8 MB). Free memory was 150.8 MB in the beginning and 214.2 MB in the end (delta: -63.4 MB). Peak memory consumption was 85.5 MB. Max. memory is 8.0 GB. [2021-07-09 16:24:10,821 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 188.7 MB. Free memory is still 168.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 16:24:10,821 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.06 ms. Allocated memory is still 188.7 MB. Free memory was 150.6 MB in the beginning and 162.0 MB in the end (delta: -11.4 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. [2021-07-09 16:24:10,821 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.81 ms. Allocated memory is still 188.7 MB. Free memory was 162.0 MB in the beginning and 160.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 16:24:10,821 INFO L168 Benchmark]: Boogie Preprocessor took 30.07 ms. Allocated memory is still 188.7 MB. Free memory was 160.3 MB in the beginning and 158.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 16:24:10,821 INFO L168 Benchmark]: RCFGBuilder took 289.77 ms. Allocated memory is still 188.7 MB. Free memory was 158.9 MB in the beginning and 137.9 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-07-09 16:24:10,821 INFO L168 Benchmark]: TraceAbstraction took 7318.12 ms. Allocated memory was 188.7 MB in the beginning and 336.6 MB in the end (delta: 147.8 MB). Free memory was 137.5 MB in the beginning and 214.2 MB in the end (delta: -76.7 MB). Peak memory consumption was 72.2 MB. Max. memory is 8.0 GB. [2021-07-09 16:24:10,822 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 188.7 MB. Free memory is still 168.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 368.06 ms. Allocated memory is still 188.7 MB. Free memory was 150.6 MB in the beginning and 162.0 MB in the end (delta: -11.4 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 31.81 ms. Allocated memory is still 188.7 MB. Free memory was 162.0 MB in the beginning and 160.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.07 ms. Allocated memory is still 188.7 MB. Free memory was 160.3 MB in the beginning and 158.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 289.77 ms. Allocated memory is still 188.7 MB. Free memory was 158.9 MB in the beginning and 137.9 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7318.12 ms. Allocated memory was 188.7 MB in the beginning and 336.6 MB in the end (delta: 147.8 MB). Free memory was 137.5 MB in the beginning and 214.2 MB in the end (delta: -76.7 MB). Peak memory consumption was 72.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [i=3, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0, k++=0] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0, k++=0] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2, k++=1] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1, k++=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3, k++=2] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2, k++=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4, k++=3] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4, k++=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L716] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L719] 0 int condJ = j >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L721] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7182.5ms, OverallIterations: 12, TraceHistogramMax: 5, EmptinessCheckTime: 39.8ms, AutomataDifference: 2706.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 64.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1113 SDtfs, 3721 SDslu, 6199 SDs, 0 SdLazy, 1127 SolverSat, 335 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 592.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 661 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 1998.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2378occurred in iteration=11, InterpolantAutomatonStates: 211, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 373.6ms AutomataMinimizationTime, 11 MinimizatonAttempts, 4169 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 100.9ms SsaConstructionTime, 231.4ms SatisfiabilityAnalysisTime, 1675.3ms InterpolantComputationTime, 1068 NumberOfCodeBlocks, 1068 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 970 ConstructedInterpolants, 0 QuantifiedInterpolants, 3000 SizeOfPredicates, 49 NumberOfNonLiveVariables, 1008 ConjunctsInSsa, 87 ConjunctsInUnsatCore, 18 InterpolantComputations, 4 PerfectInterpolantSequences, 0/332 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...